Product Details
Portable Coal Gas Analyzer KGD - MQ - 520 can be used to measure
the volume concentration of gases.
Product Introduction
The Portable Coal Gas Analyzer KGD - MQ - 520 adopts non -
dispersive infrared (NDIR) gas analysis technology with independent
intellectual property rights, long - life electrochemical sensing
technology, and MEMS - based thermal conductivity technology. It
can simultaneously measure the calorific values of coal gas and
biogas, as well as the volume concentrations of gases such as CO,
CO₂, CH₄, H₂, O₂, and CₙHₘ.
Product Features
- Simultaneously measures gas components and calorific values: It can
simultaneously measure the volume concentrations of gases such as
CO, CO₂, CH₄, H₂, O₂, and CₙHₘ, and automatically calculate and
display the calorific values of coal gas and natural gas, replacing
the combustion - type calorific value meter.
- High measurement accuracy: No cross - interference among multi -
component measured gases: CₙHₘ has no interference on the
measurement result of CH₄, and CO, CO₂, and CH₄ have no
interference on the measurement result of H₂. It is less affected
by the outside world, and the change of gas sampling flow has no
impact on the measurement result of the H₂ thermal conductivity
sensor. Measuring the volume concentration of CₙHₘ ensures the
accuracy of the calorific values of gases such as coke oven gas,
mixed gas, producer gas, and straw gas.
- Portable body design: Easy to carry, it can meet the needs of both
on - site industrial measurement and laboratory airbag sampling
analysis.
- Intelligent power management: Soft - start power switch and
intelligent battery power management avoid the instrument from
operating under low - power conditions.
- Simple data management: Automatically stores measurement data, with
query and deletion functions, and can transmit data to the superior
centralized control system through multiple interfaces.
- Low cost of use: Compared with gas analysis technologies such as
Orsat and chromatography, the measurement process does not require
disassembly and installation, consumption of chemical reagents,
etc. It has a simple structure, is easy to operate, and has no
consumables.
Technical Parameters
Measured Components | CO/CO₂/CH₄/H₂/O₂/C₂H₂/C₂H₄/CₙHₘ*/Calorific Value |
Measurement Principle | CO/CO₂/CH₄/C₂H₂/C₂H₄/CₙHₘ: NDIR; H₂: TCD; O₂: ECD |
Measurement Range | CO/CO₂/CH₄/H₂: (0 - 100)%; O₂: (0 - 25)%; C₂H₂/C₂H₄/CₙHₘ: (0 - 10)%
(Optional) |
Linear Error | CO/CO₂/CH₄/C₂H₂/C₂H₄/CₙHₘ: ±1%F.S.; O₂/H₂: ±2%F.S. |
Resolution | 0.01% |
Repeatability | ≤ 1% |
Response Time | T90 < 15s (NDIR) |
Optimal Flow Rate | (0.7 - 1.2) L/min |
Inlet Pressure | (2 - 50) kPa |
Gas Requirements | Dust - free, water - free, oil - free |
External Dimensions (LWH) | 412152294 (mm) |
Weight | 9kg |
Electrical Parameters | Electrical Parameters |
Communication | RS - 232 |
Power Supply | Powered by built - in rechargeable lithium - ion battery, with an
external 12.6V charger |
Display | LCD Display |
Functional Configuration | Built - in sampling air pump |
Optional pretreatment device |
Calorific value units Kcal/m³ and MJ/m³ can be freely switched |
Self - diagnosis function available for on - line inspection of
sensor status |
Note | CₙHₘ represents the sum of other hydrocarbons except methane. |
Company Profile
Xi'an Kacise Optronics Co.,Ltd. is a professional manufacturer of
measuring instruments , located in China xi’an City. Since 2008,
Xi'an Kacise focused on the development and production of pressure,
level and flow measuring instruments .

We have been specializing in manufacturing pressure, level and flow measuring instruments and related products for 10 years. Based on experienced technical
and management personnel, through efforts of our entire staff, we
have become a professional measuring instrument manufacturer and
solution provider. And we are continuously trying to improve
product quality.

Xi'an Kacise is qualified with ISO 9001-2008, GJB 9001B-2009, CE,
intrinsic safety explosion-proof and isolated safety
explosion-proof certificates, etc. which ensure that our products
comply with international standards.

Kacise sensors have already been exported to America, Spain,
Australia, Chile and 20 other countries and regions, and received
many favorable feedbacks. Our overseas distributers are also
increasing. We regard “reasonable prices, efficient production time
and good after-sales service” as our tenet, and hope to cooperate
with more customers for mutual development.

Our goal is simple: to sell the best products at the best prices,
and provides industry-leading customer service. We personally get
to know each of our customers, and we know how to discover the most
valuable part of our business , to help others achieve their goals.